Due to increasing urbanization, what used to be clear ground is now being covered by dwellings and commercial buildings. While clear ground can offer natural rainwater infiltration this becomes more difficult due to the increasing number of roofed areas, car parks and roads. At the same time...

Providing the population with high quality drinking water is an increasing problem even in Central European regions which today have abundant water. Drinking water is still considered the most valuable asset in many arid countries of the world. The saving of clean drinking water is not only useful for ecological and economic reasons, in the long run, it is a very necessary measure. Already, in several regions of the world, rainwater harvesting provides an abundance of free water of an extraordinary high quality.

Grey water is defined as faecal-free, less contaminated sewage water as per European standard 12056-1. It is accumulated while showering, bathing or washing hands and also with use of the washing machine. Water Recycling Systems allow...